Veja Configuração da orientação da página , onde este texto bastante complicado parece dizem que isso é impossível:
By default Ghostscript determines viewing page orientation based on the dominant text orientation on the page. Sometimes, when the page has text in several orientations or has no text at all, wrong orientation can be selected.
Acrobat Distiller parameter AutoRotatePages controls the automatic orientation selection algorithm. On Ghostscript, besides input stream, Distiller parameters can be given as command line arguments. For instance: -dAutoRotatePages=/None or /All or /PageByPage.
When there is no text on the page or automatic page rotation is set to /None an orientation value from setpagedevice is used. Valid values are: 0 (portrait), 3 (landscape), 2 (upside down), and 1 (seascape). The orientation can be set from the command line as -c "<> setpagedevice" using Ghostscript directly but cannot be set in ps2pdf. See Limitations below.
Ghostscript passes the orientation values from DSC comments to pdfwrite driver but they are effectively ignored there. This appears to be consistent with Distiller 5 behavior.